package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author xiangdd
 * @since 2021/12/7
 */

@RestController
@Slf4j
public class OrderController {

//    public static final String PAYMENT_URL = "http://localhost:8001";
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;
    @Resource
    private RestTemplate restTemplate;



    @GetMapping(value = "/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create",payment,CommonResult.class);
    }


    @GetMapping(value = "/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id,CommonResult.class);
    }


    @GetMapping(value = "/consumer/payment/discover")
    public CommonResult<Payment> getDiscovery() {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/discovery",CommonResult.class);
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String  getPaymentLb(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances == null || instances.size() == 0){
            return null;
        }
        ServiceInstance instance = loadBalancer.instances(instances);
        URI uri = instance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb", String.class);
    }

    // ====================> zipkin+sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin()
    {
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/", String.class);
        return result;
    }

}
